Swimming aid



FIG. 1 is a top plan view of a swimming aid;

FIG. 2 is a bottom plan view of the swimming aid of FIG. 1;

FIG. 3 is a left side view of the swimming aid of FIG. 1;

FIG. 4 is a right side view of the swimming aid of FIG. 1;

FIG. 5 is a front view of the swimming aid of FIG. 1; and,

FIG. 6 is a rear view of the swimming aid of FIG. 1.

The broken lines illustrate portions of the swimming aid that form no part of the claimed design. 

CLAIM The ornamental design for a swimming aid, as shown and described. 